Improvement in sharpening-machines



F. WHITE.

Sharpening-Machines. B10147297 Patente'dFeb.10,1874.

f /W Vf UNITED STATES PATENT OEErcE.v

FRANK WHITE, OF CINCINNATI, OHIO, ASSIGNOR TO POST 8a OO., OF SAMEPLAGE.

IMPROVEMENT IN SHARPENlNG-MACHINES.

Specification forming part of Letters Patent No. 147,297, dated Februaryl0, 1874; application file December 13, 1873.

To all whom t may concern:

Be it known that I, FRANK WHITE, of Gincinnati, in the county ofHamilton and State of Ohio, have invented certain new and usefulImprovements in Devicesl for Holding Knives, Sac., in the Process ofGrinding; and I do hereby declare the following to be a full, clear, andeX- act description of the invention, such as will enable others skilledin the art to which it pertains to make and use it, reference being hadto the accompanying drawings, which form part of this specification.

My invention relates to a device for holding planing-knives, 85e., inthe process of grinding; and consists of the devices as hereinafter setforth and claimed.

In the drawings, Figure l is a view in perspective of my machine. Fig. 2is a central vertical section of the same; and Fig. 3 is a back view ofthe machine, showing the knife in position.

A is an obtuse angular frame, pivoted upon set-screws a. B is adraw-bar, to which are secured the fasteningbutton. b, the Shanks ofwhich project through holes 1n the plate A and the draw-bar B, an'd areprovided on their front ends with screw-threads, upon which are run themilled thumbnuts O. By running these thumb-nuts on or off, the lugs orbuttons are made to project a less or greater distance through the plateA, in order to accommodate a thick or thin blade; Through the center ofthe draw-bar B runs the milled headed screw D, which impin ges upon theplate/ A and draws the bar B forward,` which in turn draws the lugs orbuttons b tightly against the blade E, and thus/secures itin position tobe ground.

The bevel to which the plate is to be ground is regulated by thetilting-screw iF, which passes through the plate A and ilnpinges uponthe bed. The blade E is provided with slots c, or their equivalents, bywhich it may be slipped over the buttons b.

Having thus fully described my invention, what I claim, and desire tosecure bly Letters Patent, is-

l. The angular plate A, provided with the draw-bar B, buttons b,set-screw C, and tiltingscrew F, the whole mechanism poised upon theset-screw pivots a, substantially as shown and described.

2. The combination of the draw-bar B, buttons b, and set-screw D,substantially as and for the purpose described.

In testimony that I claim the foregoing I have hereunto set my hand this11th day of December, 1873.

VitneSses:

ALEX. GRAYDON, JOHN M. FITZGERALD.

FRANK WHITE.

